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Surface of the zona pellucida surrounding a hamster oocyte. This scanning electron micrograph shows the zona pellicida around a hamster oocyte at high magnification. The zona pellicida has a complex weave and is comprised of three glycoproteins, ZP1, ZP2 and ZP3. The sample was fixed using glutaraldehyde and osmium tetroxide, dehydrated in ethanol, critically point dried, coated with gold, and examined in a Phillips XL30 FEG scanning electron microscope. Magnification: 5851x.